The reason
"AppleTV’s AirPlay feature was strategically crafted to simplify the process of transferring laptop and tablet displays to a TV screen, and it is AirPlaying – not OTT streaming – that is the primary reason for purchase of AppleTV devices," says Frost & Sullivan.
This is important for Google, or Amazon, which is reportedly interested in this market. Instead of going after more and more content, it should figure out how to make its streaming gadgets work well with its own mobile devices.
Business Insider